can´t insert progress bars in my site. If I try it, there is just a little black box with a bit of transparency to see. Inside from the Box is the Text you can type in options. That´s all.
It seems there is also a problem with the padding of this element. If I insert it below another Element, for example a horizontal ruler, it´s directly below this element, without padding.

How have you added them into your page? All content elements should always be inside column elements which is how the layout is then generated for the live view.

By default, that isn’t how they should be getting displayed so I’m not sure what the issue is but knowing a bit more about how you have that content structured in your advanced layout editor will help.